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A Copper Protein and a Cytochrome Bind at the Same Site on Bacterial Cytochrome C Peroxidase† Sofia R
14566 Biochemistry 2004, 43, 14566-14576 A Copper Protein and a Cytochrome Bind at the Same Site on Bacterial Cytochrome c Peroxidase† Sofia R. Pauleta,‡,§ Alan Cooper,⊥ Margaret Nutley,⊥ Neil Errington,| Stephen Harding,| Francoise Guerlesquin,3 Celia F. Goodhew,‡ Isabel Moura,§ Jose J. G. Moura,§ and Graham W. Pettigrew‡ Veterinary Biomedical Sciences, Royal (Dick) School of Veterinary Studies, UniVersity of Edinburgh, Summerhall, Edinburgh EH9 1QH, U.K., Department of Chemistry, UniVersity of Glasgow, Glasgow G12 8QQ, U.K., Centre for Macromolecular Hydrodynamics, UniVersity of Nottingham, Sutton Bonington, Nottingham LE12 5 RD, U.K., Unite de Bioenergetique et Ingenierie des Proteines, IBSM-CNRS, 31 chemin Joseph Aiguier, 13402 Marseilles cedex 20, France, Requimte, Departamento de Quimica, CQFB, UniVersidade NoVa de Lisboa, 2829-516 Monte de Caparica, Portugal ReceiVed July 5, 2004; ReVised Manuscript ReceiVed September 9, 2004 ABSTRACT: Pseudoazurin binds at a single site on cytochrome c peroxidase from Paracoccus pantotrophus with a Kd of 16.4 µMat25°C, pH 6.0, in an endothermic reaction that is driven by a large entropy change. Sedimentation velocity experiments confirmed the presence of a single site, although results at higher pseudoazurin concentrations are complicated by the dimerization of the protein. Microcalorimetry, ultracentrifugation, and 1H NMR spectroscopy studies in which cytochrome c550, pseudoazurin, and cytochrome c peroxidase were all present could be modeled using a competitive binding algorithm. Molecular docking simulation of the binding of pseudoazurin to the peroxidase in combination with the chemical shift perturbation pattern for pseudoazurin in the presence of the peroxidase revealed a group of solutions that were situated close to the electron-transferring heme with Cu-Fe distances of about 14 Å. -
Next-Generation Sequencing of Representational Difference Analysis
Planta DOI 10.1007/s00425-017-2657-0 ORIGINAL ARTICLE Next-generation sequencing of representational difference analysis products for identification of genes involved in diosgenin biosynthesis in fenugreek (Trigonella foenum-graecum) 1 1 1 1 Joanna Ciura • Magdalena Szeliga • Michalina Grzesik • Mirosław Tyrka Received: 19 August 2016 / Accepted: 30 January 2017 Ó The Author(s) 2017. This article is published with open access at Springerlink.com Abstract Within the transcripts related to sterol and steroidal Main conclusion Representational difference analysis saponin biosynthesis, we discovered novel candidate of cDNA was performed and differential products were genes of diosgenin biosynthesis and validated their sequenced and annotated. Candidate genes involved in expression using quantitative RT-PCR analysis. Based on biosynthesis of diosgenin in fenugreek were identified. these findings, we supported the idea that diosgenin is Detailed mechanism of diosgenin synthesis was biosynthesized from cycloartenol via cholesterol. This is proposed. the first report on the next-generation sequencing of cDNA-RDA products. Analysis of the transcriptomes Fenugreek (Trigonella foenum-graecum L.) is a valuable enriched in low copy sequences contributed substantially medicinal and crop plant. It belongs to Fabaceae family to our understanding of the biochemical pathways of and has a unique potential to synthesize valuable steroidal steroid synthesis in fenugreek. saponins, e.g., diosgenin. Elicitation (methyl jasmonate) and precursor feeding (cholesterol and squalene) were Keywords Diosgenin Á Next-generation sequencing Á used to enhance the content of sterols and steroidal Phytosterols Á Representational difference analysis of sapogenins in in vitro grown plants for representational cDNA Á Steroidal saponins Á Transcriptome user-friendly difference analysis of cDNA (cDNA-RDA). -
Independent Evolution of Four Heme Peroxidase Superfamilies
Archives of Biochemistry and Biophysics xxx (2015) xxx–xxx Contents lists available at ScienceDirect Archives of Biochemistry and Biophysics journal homepage: www.elsevier.com/locate/yabbi Independent evolution of four heme peroxidase superfamilies ⇑ Marcel Zámocky´ a,b, , Stefan Hofbauer a,c, Irene Schaffner a, Bernhard Gasselhuber a, Andrea Nicolussi a, Monika Soudi a, Katharina F. Pirker a, Paul G. Furtmüller a, Christian Obinger a a Department of Chemistry, Division of Biochemistry, VIBT – Vienna Institute of BioTechnology, University of Natural Resources and Life Sciences, Muthgasse 18, A-1190 Vienna, Austria b Institute of Molecular Biology, Slovak Academy of Sciences, Dúbravská cesta 21, SK-84551 Bratislava, Slovakia c Department for Structural and Computational Biology, Max F. Perutz Laboratories, University of Vienna, A-1030 Vienna, Austria article info abstract Article history: Four heme peroxidase superfamilies (peroxidase–catalase, peroxidase–cyclooxygenase, peroxidase–chlo- Received 26 November 2014 rite dismutase and peroxidase–peroxygenase superfamily) arose independently during evolution, which and in revised form 23 December 2014 differ in overall fold, active site architecture and enzymatic activities. The redox cofactor is heme b or Available online xxxx posttranslationally modified heme that is ligated by either histidine or cysteine. Heme peroxidases are found in all kingdoms of life and typically catalyze the one- and two-electron oxidation of a myriad of Keywords: organic and inorganic substrates. In addition to this peroxidatic activity distinct (sub)families show pro- Heme peroxidase nounced catalase, cyclooxygenase, chlorite dismutase or peroxygenase activities. Here we describe the Peroxidase–catalase superfamily phylogeny of these four superfamilies and present the most important sequence signatures and active Peroxidase–cyclooxygenase superfamily Peroxidase–chlorite dismutase superfamily site architectures. -
Relating Metatranscriptomic Profiles to the Micropollutant
1 Relating Metatranscriptomic Profiles to the 2 Micropollutant Biotransformation Potential of 3 Complex Microbial Communities 4 5 Supporting Information 6 7 Stefan Achermann,1,2 Cresten B. Mansfeldt,1 Marcel Müller,1,3 David R. Johnson,1 Kathrin 8 Fenner*,1,2,4 9 1Eawag, Swiss Federal Institute of Aquatic Science and Technology, 8600 Dübendorf, 10 Switzerland. 2Institute of Biogeochemistry and Pollutant Dynamics, ETH Zürich, 8092 11 Zürich, Switzerland. 3Institute of Atmospheric and Climate Science, ETH Zürich, 8092 12 Zürich, Switzerland. 4Department of Chemistry, University of Zürich, 8057 Zürich, 13 Switzerland. 14 *Corresponding author (email: [email protected] ) 15 S.A and C.B.M contributed equally to this work. 16 17 18 19 20 21 This supporting information (SI) is organized in 4 sections (S1-S4) with a total of 10 pages and 22 comprises 7 figures (Figure S1-S7) and 4 tables (Table S1-S4). 23 24 25 S1 26 S1 Data normalization 27 28 29 30 Figure S1. Relative fractions of gene transcripts originating from eukaryotes and bacteria. 31 32 33 Table S1. Relative standard deviation (RSD) for commonly used reference genes across all 34 samples (n=12). EC number mean fraction bacteria (%) RSD (%) RSD bacteria (%) RSD eukaryotes (%) 2.7.7.6 (RNAP) 80 16 6 nda 5.99.1.2 (DNA topoisomerase) 90 11 9 nda 5.99.1.3 (DNA gyrase) 92 16 10 nda 1.2.1.12 (GAPDH) 37 39 6 32 35 and indicates not determined. 36 37 38 39 S2 40 S2 Nitrile hydration 41 42 43 44 Figure S2: Pearson correlation coefficients r for rate constants of bromoxynil and acetamiprid with 45 gene transcripts of ECs describing nucleophilic reactions of water with nitriles. -
Thiol Peroxidases Mediate Specific Genome-Wide Regulation of Gene Expression in Response to Hydrogen Peroxide
Thiol peroxidases mediate specific genome-wide regulation of gene expression in response to hydrogen peroxide Dmitri E. Fomenkoa,1,2, Ahmet Koca,1, Natalia Agishevaa, Michael Jacobsena,b, Alaattin Kayaa,c, Mikalai Malinouskia,c, Julian C. Rutherfordd, Kam-Leung Siue, Dong-Yan Jine, Dennis R. Winged, and Vadim N. Gladysheva,c,2 aDepartment of Biochemistry, University of Nebraska, Lincoln, NE 68588-0664; bDepartment of Life Sciences, Wayne State College, Wayne, NE 68787; dDepartment of Medicine, University of Utah Health Sciences Center, Salt Lake City, UT 84132; eDepartment of Biochemistry, University of Hong Kong, Hong Kong, China; and cDivision of Genetics, Department of Medicine, Brigham and Women’s Hospital and Harvard Medical School, Boston, MA 02115 Edited by Joan Selverstone Valentine, University of California, Los Angeles, CA, and approved December 22, 2010 (received for review July 21, 2010) Hydrogen peroxide is thought to regulate cellular processes by and could withstand significant oxidative stress. It responded to direct oxidation of numerous cellular proteins, whereas antioxi- several redox stimuli by robust transcriptional reprogramming. dants, most notably thiol peroxidases, are thought to reduce However, it was unable to transcriptionally respond to hydrogen peroxides and inhibit H2O2 response. However, thiol peroxidases peroxide. The data suggested that thiol peroxidases transfer have also been implicated in activation of transcription factors oxidative signals from peroxides to target proteins, thus activating and signaling. It remains unclear if these enzymes stimulate or various transcriptional programs. This study revealed a previously inhibit redox regulation and whether this regulation is widespread undescribed function of these proteins, in addition to their roles or limited to a few cellular components. -
Geneid T-Test Q-Val Gene Symbol Gene Title GO Biological Process
Supplementary Table 2. Genes selected by FADA as the most discriminant between tumoral and normal prostate samples GO Biological Process GO Molecular Function GO Cellular Component GeneID T-test q-val Gene Symbol Gene Title Description Description Description Pathway serine-type endopeptidase inhibitor activity /// endopeptidase inhibitor serpin peptidase inhibitor, clade activity /// serine-type endopeptidase 213572_s_at -6.753 2.213E-05 SERPINB1 B (ovalbumin), member 1 --- inhibitor activity cytoplasm --- ion transport /// cellular defense response /// positive regulation of T-cell, immune regulator 1, cell proliferation /// proton plasma membrane /// integral to ATPase, H+ transporting, transport /// transport /// proton transporter activity /// hydrogen ion plasma membrane /// membrane /// 204158_s_at -5.729 8.585E-05 TCIRG1 lysosomal V0 subunit A3 transport transporter activity integral to membrane --- chemotaxis /// cell adhesion /// homophilic cell adhesion /// nervous system development /// cell differentiation /// positive roundabout, axon guidance regulation of axonogenesis /// receptor activity /// axon guidance integral to plasma membrane /// cell receptor, homolog 1 development /// nervous system receptor activity /// identical protein surface /// membrane /// integral to 213194_at -6.168 4.441E-05 ROBO1 (Drosophila) development binding /// protein binding membrane --- structural molecule activity /// nucleus /// intermediate filament /// protein binding /// microtubule cytoplasmic dynein complex /// 203411_s_at -5.297 1.636E-04 -
Bifunctional CYP81AA Proteins Catalyse Identical Hydroxylations but Alternative Regioselective Phenol Couplings in Plant Xanthone Biosynthesis
ARTICLE Received 27 Oct 2015 | Accepted 30 Mar 2016 | Published 5 May 2016 DOI: 10.1038/ncomms11472 OPEN Bifunctional CYP81AA proteins catalyse identical hydroxylations but alternative regioselective phenol couplings in plant xanthone biosynthesis Islam El-Awaad1,2,w, Marco Bocola3, Till Beuerle1,2, Benye Liu1,2 & Ludger Beerhues1,2 Xanthones are natural products present in plants and microorganisms. In plants, their biosynthesis starts with regioselective cyclization of 2,30,4,6-tetrahydroxybenzophenone to either 1,3,5- or 1,3,7-trihydroxyxanthones, catalysed by cytochrome P450 (CYP) enzymes. Here we isolate and express CYP81AA-coding sequences from Hypericum calycinum and H. perforatum in yeast. Microsomes catalyse two consecutive reactions, that is, 30-hydro- xylation of 2,4,6-trihydroxybenzophenone and C–O phenol coupling of the resulting 2,30, 4,6-tetrahydroxybenzophenone. Relative to the inserted 30-hydroxyl, the orthologues Hc/HpCYP81AA1 cyclize via the para position to form 1,3,7-trihydroxyxanthone, whereas the paralogue HpCYP81AA2 directs cyclization to the ortho position, yielding the isomeric 1,3,5- trihydroxyxanthone. Homology modelling and reciprocal mutagenesis reveal the impact of S375, L378 and A483 on controlling the regioselectivity of HpCYP81AA2, which is converted into HpCYP81AA1 by sextuple mutation. However, the reciprocal mutations in HpCYP81AA1 barely affect its regiospecificity. Product docking rationalizes the alternative C–O phenol coupling reactions. Our results help understand the machinery of bifunctional CYPs. 1 Institute of Pharmaceutical Biology, Technische Universita¨t Braunschweig, Mendelssohnstrae 1, Braunschweig 38106, Germany. 2 Center of Pharmaceutical Engineering (PVZ), Technische Universita¨t Braunschweig, Franz-Liszt-Strae 35A, Braunschweig 38106, Germany. 3 Institute of Biotechnology, RWTH Aachen University, Worringerweg 1, Aachen 52074, Germany. -
The Catalytic Role of the Distal Site Asparagine-Histidine Couple in Catalase-Peroxidases
Eur. J. Biochem. 270, 1006–1013 (2003) Ó FEBS 2003 doi:10.1046/j.1432-1033.2003.03476.x The catalytic role of the distal site asparagine-histidine couple in catalase-peroxidases Christa Jakopitsch1, Markus Auer1,Gu¨ nther Regelsberger1, Walter Jantschko1, Paul G. Furtmu¨ ller1, Florian Ru¨ ker2 and Christian Obinger1 1Institute of Chemistry and 2Institute of Applied Microbiology, University of Agricultural Sciences, Vienna, Austria Catalase-peroxidases (KatGs) are unique in exhibiting an 6% and that of Asn153fiAsp is 16.5% of wild-type activity. overwhelming catalase activity and a peroxidase activity of Stopped-flow analysis of the reaction of the ferric forms with broad specificity. Similar to other peroxidases the distal H2O2 suggest that exchange of Asn did not shift significantly histidine in KatGs forms a hydrogen bond with an adjacent the ratio of rates of H2O2-mediated compound I formation conserved asparagine. To investigate the catalytic role(s) of and reduction. Both rates seem to be reduced most probably this potential hydrogen bond in the bifunctional activity of because (a) the lower basicity of His123 hampers its function KatGs, Asn153 in Synechocystis KatG was replaced with as acid-base catalyst and (b) Asn153 is part of an extended either Ala (Asn153fiAla) or Asp (Asn153fiAsp). Both KatG-typical H-bond network, the integrity of which seems variants exhibit an overall peroxidase activity similar with to be essential to provide optimal conditions for binding and wild-type KatG. Cyanide binding is monophasic, however, oxidation of the second H2O2 molecule necessary in the the second-order binding rates are reduced to 5.4% catalase reaction. -
Mode of Action of Lactoperoxidase As Related to Its Antimicrobial Activity: a Review
Hindawi Publishing Corporation Enzyme Research Volume 2014, Article ID 517164, 13 pages http://dx.doi.org/10.1155/2014/517164 Review Article Mode of Action of Lactoperoxidase as Related to Its Antimicrobial Activity: A Review F. Bafort,1 O. Parisi,1 J.-P. Perraudin,2 and M. H. Jijakli1 1 Plant Pathology Laboratory, Liege´ University, Gembloux Agro-Bio Tech, Passage des Deport´ es´ 2, 5030 Gembloux, Belgium 2 Taradon Laboratory, Avenue Leon´ Champagne 2, 1480 Tubize, Belgium Correspondence should be addressed to F. Bafort; [email protected] Received 17 June 2014; Revised 19 August 2014; Accepted 19 August 2014; Published 16 September 2014 Academic Editor: Qi-Zhuang Ye Copyright © 2014 F. Bafort et al. This is an open access article distributed under the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited. Lactoperoxidase is a member of the family of the mammalian heme peroxidases which have a broad spectrum of activity. Their best known effect is their antimicrobial activity that arouses much interest in in vivo and in vitro applications. In this context, the proper use of lactoperoxidase needs a good understanding of its mode of action, of the factors that favor or limit its activity, and of the features and properties of the active molecules. The first part of this review describes briefly the classification of mammalian peroxidases and their role in the human immune system and in host cell damage. The second part summarizes present knowledge on the mode of action of lactoperoxidase, with special focus on the characteristics to be taken into account for in vitro or in vivo antimicrobial use. -
Respiration Triggers Heme Transfer from Cytochrome C Peroxidase to Catalase in Yeast Mitochondria
Respiration triggers heme transfer from cytochrome c peroxidase to catalase in yeast mitochondria Meena Kathiresan, Dorival Martins, and Ann M. English1 Quebec Network for Research on Protein Function, Structure, and Engineering and Department of Chemistry and Biochemistry, Concordia University, Montreal, QC, Canada, H4B 1R6 Edited by Harry B. Gray, California Institute of Technology, Pasadena, CA, and approved October 14, 2014 (received for review May 24, 2014) In exponentially growing yeast, the heme enzyme, cytochrome c per- Because Ccp1 production is not under O2/heme control (4, 5), oxidase (Ccp1) is targeted to the mitochondrial intermembrane space. CCP activity is assumed to be the frontline defense in the mito- When the fermentable source (glucose) is depleted, cells switch to chondria, a major source of reactive oxygen species (ROS) in respiration and mitochondrial H2O2 levels rise. It has long been as- respiring cells (7). Contrary to the time-honored assumption that sumed that CCP activity detoxifies mitochondrial H2O2 because of the Ccp1 catalytically consumes the H2O2 produced during aerobic efficiency of this activity in vitro. However, we find that a large pool respiration (8), recent studies in our group reveal that the per- of Ccp1 exits the mitochondria of respiring cells. We detect no extra- oxidase behaves more like a mitochondrial H2O2 sensor than mitochondrial CCP activity because Ccp1 crosses the outer mitochon- a catalytic H2O2 detoxifier (9–11). Notably, Ccp1 competes with drial membrane as the heme-free protein. In parallel with apoCcp1 complex IV for reducing equivalents from Cyc1, which shuttles export, cells exhibit increased activity of catalase A (Cta1), the mito- electrons from complex III (ubiquinol cytochrome c reductase) chondrial and peroxisomal catalase isoform in yeast. -
Progress in the Production of Medicinally Important Secondary
Progress in the production of medicinally important secondary metabolites in recombinant microorganisms or plants-Progress in alkaloid biosynthesis Michael Wink, Holger Schäfer To cite this version: Michael Wink, Holger Schäfer. Progress in the production of medicinally important secondary metabo- lites in recombinant microorganisms or plants-Progress in alkaloid biosynthesis. Biotechnology Jour- nal, Wiley-VCH Verlag, 2009, 4 (12), pp.1684. 10.1002/biot.200900229. hal-00540529 HAL Id: hal-00540529 https://hal.archives-ouvertes.fr/hal-00540529 Submitted on 27 Nov 2010 HAL is a multi-disciplinary open access L’archive ouverte pluridisciplinaire HAL, est archive for the deposit and dissemination of sci- destinée au dépôt et à la diffusion de documents entific research documents, whether they are pub- scientifiques de niveau recherche, publiés ou non, lished or not. The documents may come from émanant des établissements d’enseignement et de teaching and research institutions in France or recherche français ou étrangers, des laboratoires abroad, or from public or private research centers. publics ou privés. Biotechnology Journal Progress in the production of medicinally important secondary metabolites in recombinant microorganisms or plants-Progress in alkaloid biosynthesis For Peer Review Journal: Biotechnology Journal Manuscript ID: biot.200900229.R1 Wiley - Manuscript type: Review Date Submitted by the 28-Oct-2009 Author: Complete List of Authors: Wink, Michael; Heidelberg University, Institute for Pharmacy and Molecular Biotechnology -
Molecular Characterization, Protein–Protein Interaction Network, and Evolution of Four Glutathione Peroxidases from Tetrahymena Thermophila
antioxidants Article Molecular Characterization, Protein–Protein Interaction Network, and Evolution of Four Glutathione Peroxidases from Tetrahymena thermophila Diana Ferro 1,2, Rigers Bakiu 3 , Sandra Pucciarelli 4, Cristina Miceli 4 , Adriana Vallesi 4 , Paola Irato 5 and Gianfranco Santovito 5,* 1 BIO5 Institute, University of Arizona, Tucson, AZ 85719, USA; [email protected] 2 Department of Pediatrics, Children’s Mercy Hospital and Clinics, Kansas City, MO 64108, USA 3 Department of Aquaculture and Fisheries, Agricultural University of Tirana, 1000 Tiranë, Albania; [email protected] 4 School of Biosciences and Veterinary Medicine, University of Camerino, 62032 Camerino, Italy; [email protected] (S.P.); [email protected] (C.M.); [email protected] (A.V.) 5 Department of Biology, University of Padova, 35131 Padova, Italy; [email protected] * Correspondence: [email protected] Received: 6 September 2020; Accepted: 1 October 2020; Published: 2 October 2020 Abstract: Glutathione peroxidases (GPxs) form a broad family of antioxidant proteins essential for maintaining redox homeostasis in eukaryotic cells. In this study, we used an integrative approach that combines bioinformatics, molecular biology, and biochemistry to investigate the role of GPxs in reactive oxygen species detoxification in the unicellular eukaryotic model organism Tetrahymena thermophila. Both phylogenetic and mechanistic empirical model analyses provided indications about the evolutionary relationships among the GPXs of Tetrahymena and the orthologous enzymes of phylogenetically related species. In-silico gene characterization and text mining were used to predict the functional relationships between GPxs and other physiologically-relevant processes. The GPx genes contain conserved transcriptional regulatory elements in the promoter region, which suggest that transcription is under tight control of specialized signaling pathways.